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Switching fax machines to IP

In general, fax machines can still be used after switching to IP telephony. Analogue fax machines can be connected directly to the router, just like fixed-line telephones. The number of digital solutions, such as fax services over e-mail, are also increasing. At the beginning of 2018, the full migration of customer lines to IP began across Switzerland to help drive the phasing out of the old infrastructure in those areas. Customers who did not migrate to an IP product then should do so as quickly as possible. Swisscom will provide them with support.

Frequently asked questions

Can I use my fax machine with IP?

In general, you will still be able to use your analogue fax machine after switching to IP. With IP, you need to connect your fax machine to the analogue telephone adapter on the router, just like fixed-line telephones.
If your analogue fax machine no longer works properly after switching to All IP, please make the following changes to the settings on your device:

a) Reduce the transmission rate, e.g. from 14,400 bps to 9,600 bps.

b) Turn error correction off: switch Error Correction Mode (ECM) to “off”.

As a business customer, what must I do?

If an analogue fax machine must be used, please note that Swisscom cannot guarantee that it will be possible to transmit faxes. The reasons for this are the variety of parameters of the IP network, which are network- and location-specific and could possible cause issues with fax transmission. This is why, for the transmission of business-critical data, we recommend switching to a new solution.

How reliable is fax transmission with IP?

Faxes and other modulated services in the voice transmission bandwidth do not have the same level of reliability in the IP environment. However, we are unable to comment on individual cases since various factors can significantly influence transmission quality, such as the type of device, device settings and type of device connection to the IP network at the transmitter and receiver. Documents may not be completely rendered or the transfer itself may break down entirely due to technological reasons. At international transfer level especially, you need to anticipate increasing difficulties.

Are there any simple alternatives?

We assume that analogue communication services will disappear from the market in the medium to short term. Swisscom offers business customers its ZeroFax Business solution. Combox® pro is also an alternative for sending and receiving fax documents.


Switching special applications to IP

Alarm systems, lift phones, fire alarms: all major, and often life-saving special applications which are affected by the switch to All IP. Unlike fixed network connections, we cannot provide customers with direct support because the contracts for these applications are concluded with the respective providers and not with us. Find out more in our video.

Video total length 02:17 min.